The Second Mile, a program for at-risk youth, said in a statement that it immediately acted in 2008 to ban Mr. Sandusky from programs involving children when he told them he was under investigation for sexual contact with a juvenile but had denied any wrongdoing.

However, the organization knew as early as 1998 that Mr. Sandusky was under investigation for similar sexual misconduct in a Penn State shower involving a different boy from the program, according to a presentment by a statewide investigating grand jury.

The Second Mile also knew about a 2002 sex abuse investigation into Sandusky. Again, the organization made no move to keep Sandusky away from kids. Not for another six years.